#include<iostream> using namespace std; int main(){ /* double n=100,s=100; for(int i=0;i<=9;i++){ n=n/2.0; s=s+n*2; } printf("%.6lf %.6lf",s,n); */ /* int m,n; cin>>m>>n; for(int i=0;i<=n;i--){ m=m/13;n=n/13; } cout<<m<<" "<<n; */ /* int m,n,sum=0; cin>>m>>n; for(int i=m;i<=n;i++){ if(i%13==0) sum+=i; } cout<<sum; */ /* int m; cin>>m; for(int i=0;i<20;i++){ m=m+m*0.2; } cout<<m; */ /* int y,m; cin>>y>>m; for(int i=y;i<=y+10;i++){ if((i%400==0)||(i%4==0&&i%100!=0)) m=m+m*0.3; else m=m+m*0.2; } cout<<m; */ /* int n,g=1; cin>>n; for(int i=1;i<=n-1;i++){ g=(g+1)*2; } cout<<g; */ /* double fz=2,fm=1,fz0=0,fm0=0,sum=0,n; cin>>n; for(int i=1;i<=n;i++){ sum=sum+fz/fm; fz0=fz; fm0=fm; fz=fz0+fm0; fm=fz0; } printf("%.4lf",sum); */ /* int n,x,min=10000; cin>>n; for(int i=1;i<=n;i++){ cin>>x; if(x<min) min=x; } cout<<min; */ /* cout<< "hello lema" ; */ /* int i,sum=0; i=0; while(sum<=1000){ sum+=i; i++; } cout<<i-1; */ /* int i,n; cin>>n; i=2; while(i<=n/2){ if(n%i==0) { cout<<"No"; return 0;} i++; } cout<<"Yes"; */ /* int a,b,i; cin>>a>>b; i=a; while(i>0){ if(a%i==0&&b%i==0) {cout<<i; return 0;} i--; } */ /* char a; cin>>a; cout<<int(a); */ /* int n,w=0; cin>>n; while(n!=0){ n=n/10; w++; } cout<<w; */ /* int n,sum=0; cin>>n; while(n!=0){ sum=sum+n%10; n/=10; } cout<<sum; */ /* int c=0,n1=1,n2=1,sum=0; while(c<=1000){ c++; if(n1==n2) sum++; n1++; n2++; if(n1==21) n1=1; if(n2==31) n2=1; } cout<<sum; */ int time=0,qw=0,xm=0,xy=0,f=0,count=0; while(qw+xm+xy<30){ time++; f=0; if(qw<=10){ f=1; qw++; } if(xm<=10&&time%2==0){ f=1; xm++; } if(xy<=10&&time%4==0){ f=1; xy++; } if(f){ count++; } } cout<<count<<endl; return 0; }